87581358 has 16 divisors (see below), whose sum is σ = 194625360. Its totient is φ = 29193768.

The previous prime is 87581357. The next prime is 87581369. The reversal of 87581358 is 85318578.

It is a happy number.

It is a super-3 number, since 3×87581358³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87581353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810885 + ... + 810992.

It is an arithmetic number, because the mean of its divisors is an integer number (12164085).

Almost surely, 2^87581358 is an apocalyptic number.

87581358 is an abundant number, since it is smaller than the sum of its proper divisors (107044002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87581358 is a wasteful number, since it uses less digits than its factorization.

87581358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621888 (or 1621882 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 87581358 is about 9358.4912245511. The cubic root of 87581358 is about 444.0895546164.

The spelling of 87581358 in words is "eighty-seven million, five hundred eighty-one thousand, three hundred fifty-eight".